Oxo-und Thiovanadium(V)-Thiolate/Oxo and Thiovanadium(V) Thiolates

Abstract

Abstract Syntheses of oxovanadium(V) thiolates such as O = V(SR)3 (R = tC4H9 , SiPh3 ) and O=V(OtC4H9 )n(StC4H9)3-n(n = 1, 2) are described. The thiovanadium(V) compounds S=V(OtC4H9 )3 , S = V(StC4H9)(OtC4H9) 2 and S=V(SSiPh3)3 have been prepared by various methods :substition using Lawesson reagent, oxidation of V(OtC4H9)4 by sulfur, or disproportionation reaction of VCl4 with LiSSiPh3 ; O = V (OSiR3)3 (R = Me , Ph) undergoes a reaction with Lawesson reagent to yield dithiophosphonate complexes. All compounds obtained are characterized by 1H and 51V NMR spectroscopy; the stability of thiovanadium(V) compounds is discussed. V(StC4H9)4 has been synthesized as a first example of vanadium(IV) thiolates